Research from many nations overseas has shown an increasing public acceptance over the past two to three decades of sexual minorities and the rights of same-sex couples. This article investigates how public support has changed in Australia over the last 10 years, with a comparison of 2005 and 2015 data from the Household, Income and Labour Dynamics in Australia (HILDA) Survey. It analyses individuals' perceptions of whether or not gay/lesbian couples should have the same rights as heterosexual couples, and the extent to which factors such as gender, age, education, religiosity, ethno-migrant background, or area of residence are predictive of these attitudes. The findings show a high degree of support for equal rights, up from 40% in 2005 to 66% in 2015. These changes cannot be attributed to compositional changes in population characteristics, and may be the product of cultural or institutional changes at the macro level.